/**
 * @file codeforces/1681/c/main
 * @brief
 * @see
 * @author Ruiming Guo (guoruiming@stu.scu.edu.cn)
 * @copyright 2022
 * @date 5/23/2022 22:34:26
 **/

#include <bits/stdc++.h>
#define rep(i, a, b) for (int i = (a); i < (int)(b); ++i)
using namespace std;
typedef long long ll;
typedef vector<int> vi;
typedef pair<int, int> pi;
const int INF = 0x3f3f3f3f;
const ll LLINF = 0x3f3f3f3f3f3f3f3f;
const int N = INF;
int main() {
  // High rating and good luck!
  ios::sync_with_stdio(0), cin.tie(0), cout.tie(0);

  return 0;
}
